Technical description and composition of the PHILIPS 37PFL7662D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 37PFL7662D / 12
Chassis / Version: LC7.2E LA
Panel: T370HW02 V.1
T-CON: AUO-24; 24LC64I
Inverter (backlight): DARFON 4H.V1838.461 / B
PWM Inverter: OZ964SN
Trans Inverter: 6016B701002 (GP) -04
Power Supply (PSU): PLCD300P3 3122 423 31942
PWM Power: TEA1601T (16), TEA1533AT (14), L6562D (PFC)
MOSFET Power: 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP
MainBoard: 313912362611 3139 123 62611 313926807405
IC MainBoard: pnx8314HS / 102; K4S281632I; M29W320ET; 732 LF; M30300AGP
Tuner: TD1316AF / IHP-2
Control: IR: 3139 123 6210.1v2 WK632.5
Specifications 37PFL7662D
PHILIPS 37PFL7662D
General recommendations for repairing TV LCD
It is recommended that you start troubleshooting diagnostics for the PHILIPS 37PFL7662D / 12 TV, as well as all other electronic devices, with an external inspection of both external and internal elements and modules. It often happens that some damage to elements or connections helps determine the direction of the troubleshooting. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Power Module Repair
Sometimes the PHILIPS 37PFL7662D / 12 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. In the event that the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in breakdown conditions in such situations.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail by itself for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked by replacement, and also other semiconductor elements (diodes, transistors, zener diodes).
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it can sometimes become more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
Inverter Repair
If PHILIPS 37PFL7662D / 12 does not have an image, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
When repairing the inverter, it is often necessary for diagnostics to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair Main Board
When repairing an MB board, you must check its components pnx8314HS / 102; K4S281632I; M29W320ET; 732 LF; M30300AGP. Defective items should be replaced.
Once again, remind users! Attempts to independently repair the PHILIPS 37PFL7662D / 12 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 37PFL7662D/12 Chassis LC7.2E LA
PSU SCHEMATIC -------------> PLCD300P3
The appearance of MainBoard 313912362611 is shown in the figure below:313912362611
313912362611 can be used in TVs:
PHILIPS 26HF5445/10 (Panel V260B1-L03 code 068 p/n: 932224937682), PHILIPS 37PFL7662D/12 (Panel T370HW02 V.1), PHILIPS 42PFL7662D/12 (Panel LC420WU5 code 093), PHILIPS 42PFL7682D/12 (Panel LC420WU5), PHILIPS 47PFL5522D/12 (Panel LC470WX1-SLA2 code 109 p/n: 932225331682 (LGPH) B ), PHILIPS 32PFL5522D/12 (Panel LK315T3LZ53).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the PLCD300P3 module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the L6562D PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 37PFL7662D device:
Installed matrix (LCD panel) T370HW02 V.1.
The matrix control uses the Timing Controller (T-CON) AUO-24 ;.
A DARFON inverter is used to power the backlight, controlled by the OZ964SN PWM controller. A transformer 6016B701002 (GP) -04 is installed in the inverter converter.
The necessary supply voltages for all nodes of the PHILIPS 37PFL7662D TV are generated by the PLCD300P3 power supply module or its analogs using TEA1601T (16), TEA1533AT (14), L6562D (PFC) microcircuits and power switches of the type 2SK4075, F11NM60N, P4NK60ZFP, P6NP60.
MainBoard - the main board (motherboard) is a module 313912362611, using pnx8314HS / 102 microcircuits; K4S281632I; M29W320ET; 732 LF; M30300AGP and others.
The TD1316AF / IHP-2 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T370HW02 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/15 (Tr / Td); 6 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V